allerton



G.M.ALLERTON. FORMING TIGHT SBAMS IN RUBBER CLOTH.

No. 77,859. "Patented May 12, 1868.

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GEORGE ALIIERTON, OF NEW YORK, N. "Y.

Letters Patent No. 77,859, dated May 12, 1868.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, GEORGE M. ALLLEMON, of the city and State of New Yorlqhave invented and made a a certain new and useful Improvement in Air and Water-Tight Seams in Rubber Cloth; and I do hereby declare the following to bee-full, clear, and exact description of the said invention, reference being bad to the'a nnexed drawing, making part of this specification, wherein- V Figure 1 is a section showing the mode of uniting the cd'ges of rubber cloth to forman air and water-tigi seam, and

Figure 2 is a side view of a portion 0f such seam. Similar parts are referred to by like letters. Heretofore, in uniting India-rubber cloth, it has been usual to apply cement to the contiguous surfaces, near the edges where'such cloth laps' to form the joint. In that case, tbeends of the fibres in the woven fabric are exposed between the layers of rubber at the edges ofthe fabric. -'Ibese absorb moisture, or allow airto pass in between the two layers of rubber, and the strain at the joint is actually taken upon the India rubber instead of the cloth.

In cases where rivets'have: been resorted to, as iu Indi a'-rubber belting, the rivets,- if applied to air-bugs, buoys, 'fioats, or life-preservers, would allow the escape of air or the leakage of water.

The nature of my said invention consists in a joint or seamfor rubber cloth, formedwith "India-rubber stoppers over the rivets, and lapping-strips for the edges of the fabric, wherebyt he seam is made strong by the rivets, and those rendered air and water-tight by the stoppers,-and the fibrous material covered at its edges by the lapping-strips. V

In the drawing, (Hand 6 are the diifereut sheets or portions of the same sheet to be united at the edges. c c are the rivets, introduced in either one or two rows.

I prefer that the surfaces of rubber in contact at the seam be united by India-rubber cement previously;

to riveting. v I

d 51 are India-rubber stoppers, cemented over the rivets, to prevent air or water passing between the rivet and the rubber 'clot-h.

e e are'the lapping-stiips, covering the edges of the fabric, and lapping upon the India-rubber surfaces of such fabrics. These are-to be cemented into place. 7

The stoppers d may be separate pieces,'as shown, or formed'by strips extending over several rivets. The seams made in aforesaid manner are stronger thantbe'body of the rubber-cloth, and entirely water and air-tight.-

What I claim, and desire to secure by Letters Patent, is- V The Stoppers to the rivets, and the lapping-strips, applied to and combined with the joint or seam of Indiarubber cloth, as and for the purposes set forth. I In witness whereof, I have hereunto-satiny signature, this twelfth day of February, 1868.

GEO. M; ALLERTON. Witnesses:

G'nss. H. Siam, Geo. D. Wstxnn. 

